Otomycosis of the auditory canal is common in Burma. Of 346 cases of otitis externa seen in a hospital outpatient clinic during two consecutive rainy seasons, 189 were due to fungus infection. Aspergillus species were the fungi isolated most frequently. Infection was most commonly due to self-manipulation. Itching and tinnitus were common complaints. Treatment by local cleansing and application of antifungal agents was effective, 10% 5-fluorocytosine ointment being most successful.